json.diff

diff --git a/lib/Mojolicious/Validator/Validation.pm b/lib/Mojolicious/Validator/Validation.pm
index ac1c410..5d28115 100644
--- a/lib/Mojolicious/Validator/Validation.pm
+++ b/lib/Mojolicious/Validator/Validation.pm
@@ -1,7 +1,8 @@
 package Mojolicious::Validator::Validation;
 use Mojo::Base -base;
 
-use Carp         ();
+use Carp ();
+use Mojo::JSON::Pointer;
 use Scalar::Util ();
 
 has [qw(csrf_token topic validator)];
@@ -23,9 +24,12 @@ sub check {
 
   return $self unless $self->is_valid;
 
-  my $cb    = $self->validator->checks->{$check};
-  my $name  = $self->topic;
-  my $input = $self->input->{$name};
+  my $cb   = $self->validator->checks->{$check};
+  my $name = $self->topic;
+  my $input
+    = $name =~ m!^/!
+    ? Mojo::JSON::Pointer->new($self->input)->get($name)
+    : $self->input->{$name};
   for my $value (ref $input eq 'ARRAY' ? @$input : $input) {
     next unless my $result = $self->$cb($name, $value, @_);
     return $self->error($name => [$check, $result, @_]);